Showing posts with label tropical depression. Show all posts
Showing posts with label tropical depression. Show all posts

Tuesday, August 27, 2019

Tropical Storm Dorian And Other Tropical Updates

Tropical Storm Dorian, as seen in this forecast path,
could make it to Florida by Sunday. But will it survive the trip?
Over the past couple of days little Tropical Storm Dorian has been making its way generally westward across the Atlantic, and still, noboy can figure out how much trouble it will cause.

Dorian is over warm water and there is a lack of strong winds aloft, which favors strengthening.  But it's surrounded by dry air aloft, which is choking the thunderstorms Dorian is trying to develop and get stronger.

All this leaves a lot of questions about how bad this will get. Meanwhile, other parts of the Atlantic are bubbling with activity, which I'll get to in a moment.

Dorian is expected to move by close to Puerto Rico and the Dominican Republic Wednesday and Thursday. Of course, this isn't terrific news for Puerto Rico in particular, as it continues to struggle with the aftermath of 2017's mega hurricane Maria.

Obviously, Dorian won't be nearly as bad as Maria as it passes by Puerto Rico, but it's still not going to help.

Forecasters have gotten better at predicted the paths of tropical storms and hurricanes, but forecasting their strength still prompts experts to pull their hair out.

Interaction with land usually weakens tropical storms and hurricanes. It's possible this could be like Tropical Storm Erika in 2015, which was similar in size and location to Dorian.  The land interaction around the Dominican Republic destroyed Erika.

Erika did cause death and destruction, especially in Dominica from flooding. Erika scared the bejeezus out of Florida because it seemed headed for that state. But the land interaction and dry air aloft blew Erika apart before it reached Florida.

Dorian's forecast track takes it to Florida by around Sunday, at least that's what current predictions show. With land interaction in Caribbean Islands and dry air aloft choking the system down, will Dorian make it as far as Florida? If it does, which is iffy, how strong will it be? The National Hurricane Center is on it, but it's a tough forecast.

Stay tuned. Sam bat channel.

The other day, we talked about a disturbance near Florida that was threatening to become a tropical storm. Since then, it has to a spot well off the South Carolina coast and has become a poorly organized tropical depression.

Still, it is expected to become Tropical Storm Erin later today.  High winds aloft will keep wannabe Erin from developing much. Current forecasts have it moving northeastward far off the U.S East Coast as a relatively weak tropical storm. It's remains will probably hit Newfoundland, Canada on Saturday.


Wednesday, May 30, 2018

Tropical Depression Strikes Indiana Of All Places, Bad Flooding Elsewhere

Tropical Depression Alberto still has a well defined tropical-like
circulation over Indiana on Wednesday. 
This morning, former subtropical Storm Alberto was still a tropical depression - in Indiana of all places.

Alberto has held together remarkably well as a tropical system. Usually, they transition pretty quickly to non-tropical storm systems or disturbances soon after moving inland.

Alberto will indeed become just a regular old inland weather system later today, but it's survivability into Indiana is pretty incredible.

Satellite photos from this morning show a well defined pinwheel Tropical Depression Alberto centered not far from Terre Haute, Indiana.

This is a big example of what's known as the "brown ocean."  The tropical disturbance can hold together becuase there is no influence from an upper level low that would disrupt the circulation. Also, there was plenty of low level and moisture from the ground to support the tropical system.

Remember, tropical systems depend on warm water to maintain their strength and integrity. When they go inland, that source of nutrition for tropical systems ends. Usually. Except in cases like this when there's nothing to disrupt them and there's plenty of atmospheric moisture to work with.

North Carolina Department of Transportation truck swept into a river
Tuesday. The two workers in the truck were rescued. 
While the actual circulation of Alberto is relatively small, it drew huge quantities of tropical, wet air into parts of the nation, causing or at least greatly contributing to some pretty horrible flash floods in some locations.

Western North Carolina was especially hard hit, with plenty of evacuations, water rescues, road closures and property damage.

Even the famed Biltmore Estate in Asheville was affected: The main entrance to the mansion and tourist attraction was blocked by floodwaters.

Ashville has had its wettest May on record.

Interstate 40 in McDowell County, North Carolina was closed due to landslides and flooding. Two North Carolina state highway workers had to be rescued from the flooding.

A flash flood emergency was also declared in parts of Alabama as well. Many roads are closed and people had to be rescued from at least one flooded home.

GERMANY FLOOD, TOO

Flash flooding seems to to be all the rage this week across much of the world. We had the Ellicott City, Maryland disaster on Sunday. Other flash floods struck parts of the Rocky Mountains. Areas of Great Britaina and particularly Germany have also been slammed by these floods.

Roads and buildings flooded, roofs collapsed and people were rescued, especially around the city of Wuppertal, Germany.

Some videos:

Flooding in the Biltmore Village section of Asheville, North Carolina:



Flooding in Germany:

Sunday, August 28, 2016

Another Tropics Update: Things Are Damn Busy!

That tropical disturbance that has been hyped for a week
now is still NOT a big deal now that it's gotten south
of Florida. But now it's showing signs of spinning up
a little better and could become a tropical storm
in the next few days in the Gulf of Mexico.  
As of Sunday afternoon, the activity regarding tropical storms, hurricanes and wannabe tropical storms and hurricanes is getting fast and furious.

All KINDS of things are happening. Whether any of these will be a huge threat to life and property, especially here in the United States, is open to question, but it's all something that we should watch.

INVEST 99L

Let's start with that thing everybody in Weather Land has been talking about for days and days, known as Invest 99L.

The National Hurricane Center gives an "Invest" name to anything it's watching that could develop into a tropical storm.

Invest 99L has been the subject of all the buzz for days. That's because at least a week ago, some of the weather models have been saying it could be a HUGE threat to the United States. Other computer models said, "Pffft." but it's more fun to hype catastrophe than a big yawn.

Anyway, Invest 99L has been making its way westward across the tropical Atlantic. By the time it got near the Bahamas Friday, some computer models said it would be a monster, but of course it isn't.

Right now it's getting into the Florida straights and heading toward the Gulf of Mexico.

Soon, the time might be ripe for Invest 99L to get going. Upper level winds had been tearing apartany attempts by Invest 99L to develop into a tropical storm.  But as it enters the Gulf of Mexico, those high level winds will diminish a little bit.

Plus, the Gulf of Mexico water is very, very warm, which could help this thing get going. The National Hurricane Center, which had been sort of bored by this system as it was in the Atlantic, is perking up with some concern.

They now give Invest 99L a high chance of developing into a tropical storm in the next few days. That could pose a wind and especially heavy rain threat, most likely to some spots in the eastern half of the U.S Gulf Coast in the coming days.

Once it reaches the Gulf Coast in a few days (if it does actually make landfall) nobody has a clue as to what it will do after that.

Everybody thought this would be the next tropical storm, and it would be named Hermine. However, a surprise happened west of Bermuda overnight.

TROPICAL DEPRESSION EIGHT

An area of showers and thunderstorms not far from Bermuda was sputtering and struggling the past few days as dry air prevented things from getting going.
You can see a swirl in the middle of this satellite shot from Sunday
where the center of the tropical depression is, but that big
white clump you see is thunderstorms being torn westward
away from the center by strong upper level winds. That
means this thing probably won't get much stronger. A 

But in a bit of a surprise, this weather disturbance grew into a tropical depression, which is a step shy of a tropical storm.

Chances are it will strengthen to Tropical Storm Hermine in the next day or so, but it won't get super ultra strong. Upper level winds are ripping thunderstorms away from its center, which is hurting it, and the air is still kinda dry nearby.

Still, it could side swipe the North Carolina Outer Banks with gusty winds, rough seas, rip currents and locally heavy rains Tuesday or Wedneday before it turns and heads out to sea.

HURRICANE GASTON

The bad news is Hurricane Gaston out in the Atlantic Ocean is strong and getting stronger. The good news is it doesn't appear to be any kind of threat to the United States. At last check, it was well east of Bermuda with sustained winds of 105 mph. Yikes!

Hurricane Gaston looking strong and healthy out in the
middle of the Atlantic Ocean Sunday. No threat to the United States, though. A 
It might strengthen a bit more as it sort of hangs out there not going much of anywhere for the next few days, but then it will head off into the North Atlantic to die.

SOMETHING IN NIGERIA

A strong wave of stormy weather is in Nigeria this weekend and will soon head westward, head out of Africa and into the eastern Atlantic. There's a strong chance this thing could develop into a hurricane, but don't believe any hype on this one yet

If it does end up threatening the United States, which is iffy, it would do so in about 10 to 14 days.
Don't worry about this one yet.

HAWAII

There's a couple potential tropical storm threats for Hawaii over the next week or so.

Hurricane Lester with 85 mph sustained winds, is chugging westward across the Pacific Ocean, and is sort of headed toward Hawaii. If it makes it there, it would be sometime next weekend, so people in the Aloha State will have to keep an eye on our buddy Lester.

Before Lester gets near Hawaii, the islands will have to contend with Tropical Storm Madeline, which will be near Hawaii midweek. It should weaken by the time it gets there, but it could unleash some torrential rains and flash flooding to parts of Hawaii in the next few days.

TYPHOON LIONROCK

A typhoon named Lionrock is threatening Japan. Isn't that a great name for a typhoon or hurricane?

This isn't so great for Japan, though. It's threatening to hit the central or northern parts of Japan with winds of up to 75 or 80 mph and torrential, flooding rains this week. Could be big trouble for them.